(3.49+2.28)+7.72=3.49+(+) 61.54-37.67-11.54=61.54-- 6.45-2.5-1.5=6.45-(2.51.5)
0.91+1.25=
10-0.76=
3.99-0.9=
0.56+4.44=
0.37+0.6=
7.46+2.54=
1-0.08=
45.9+1=
10-2.45=
4.7-0.47=
3.8+1.2=
1-0.28=
①43.25-10.4-3.25
②3.8+1.37+6.2+12.63
③76.8-27.4-12.6
④5.85+1.89-2.85
⑤36.3-7.6-2.4
⑥12.85-(2.85+4.3)